Hi!

I am having big problems with my 1991 Mazda b2600!
It starts just fine, runs for about 10 minutes than it just dies!
it will not start at first but after 1-10 minutes it starts and runs like a dream until i stop it and it cools down again, than it is the same prsedure all over again every time!

I have tried 3 different ecu`s and one of them has been repaired two times with no luck.
I have changed just about every electrical part in the engine compartment, but it seems to have no effect on the problem...

My car does not have a lambda.

I think it has something to do with the car switching over form warm up mode to working temperature mode?
what do you guys think?

pleas help!
have any of you had simular problems?

 

My 92 did that, but it WAS the ecu. Had it rebuilt by a company in Florida 5 or 6 years ago and still going strong.
Have you tried changing the fuel pressure regulator on the end of the injection rail? Just a suggestion.

 

sounds like it "could" be a bad crankshaft position sensor, or camshaft position sensor. They can stop working properly when they get hot, and often will not throw out a code at all. Its a pretty important part of the ignition system, without one your car wont start at all. Did you put it on a obd reader? is your check engine light even turning on?

 

I'm wondering if you've solved this issue yet. If so, I'm curious as to what it might have been.
Does it die after 10 minutes of idling, or is this while under load?